Where does “Acantharia” come from?

Acantharia (Translingual) comes from Translingual -aria, from Latin -āria, from Latin -ārius, from Proto-Italic *-āzios.

Ancestry of “Acantharia”, step by step

Step	Language	Word	Meaning
1	Translingual	-aria	one like
2	Latin	-āria	—
3	Latin	-ārius	—
4	Proto-Italic	*-āzios	—